CN102444862A - Diffusion plate and backlight module using same - Google Patents
Diffusion plate and backlight module using same Download PDFInfo
- Publication number
- CN102444862A CN102444862A CN2010105086405A CN201010508640A CN102444862A CN 102444862 A CN102444862 A CN 102444862A CN 2010105086405 A CN2010105086405 A CN 2010105086405A CN 201010508640 A CN201010508640 A CN 201010508640A CN 102444862 A CN102444862 A CN 102444862A
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- layer
- diffuser plate
- ground floor
- layers
- copolymer
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- 238000009792 diffusion process Methods 0.000 title abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 41
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 25
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 25
- 239000004793 Polystyrene Substances 0.000 claims abstract description 16
- 229920001577 copolymer Polymers 0.000 claims abstract description 12
- 229920002223 polystyrene Polymers 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 150000002500 ions Chemical class 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 48
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 10
- 239000004973 liquid crystal related substance Substances 0.000 description 10
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- Optical Elements Other Than Lenses (AREA)
Abstract
The invention provides a diffusion plate, which at least comprises a first layer, a second layer and a third layer. The two adjacent layers have different materials; the three layers are formed as an integrated structure by integral extrusion molding; the first layer is made of polymethylmethacrylate or a copolymer thereof; the second layer is made of polystyrene; and the third layer is made of polymethylmethacrylate or a copolymer thereof. Compared with the prior art, the diffusion plate is improved in diffusivity when rays pass through the diffusion plate; optical diffusion ions need not to be added; and the manufacturing costs of the diffusion plate and a backlight module are lowered.
Description
Technical field
The present invention relates to the diffuser plate of a kind of module backlight and use thereof, relate in particular to a kind of be applied to module backlight and diffuser plate thereof on the LCDs.
Background technology
The non-luminous display unit of LCDs itself needs the configuration backlight can realize the effect that shows.Traditional LCDs comprises a liquid crystal panel and a module backlight, through module backlight light is guided on the liquid crystal panel, makes liquid crystal panel luminous.
Module backlight generally includes reflector plate, the LGP that is positioned at the reflector plate top of being located at the bottom, diffuser plate and the backlight of being located at the LGP top.Common module backlight can be divided into side light-source type and two kinds of straight light-source types down according to the position that is provided with of backlight.So-called side light-source type is that one-sided or many sides are provided with spot light in module backlight, and the light that light source penetrated is via the guiding of LGP and the reflection of reflector plate, and the scattering of importing diffuser plate, and inject on the liquid crystal panel, make liquid crystal panel produce brightness and show.And so-called straight down light-source type is the light source that emission is set through the bottom at module backlight, evenly spreads the base point light source or line source obtains area source by diffuser plate, for LCD provides light source.
At present; Diffuser plate on the market is processed by the acrylic material usually and is in order to increase the light diffusing ability of diffuser plate, has increased the higher fluorescence blast additive of cost by single layer structure usually in diffuser plate; This has not only increased the manufacturing cost of diffuser plate, does not also meet environmental protection trend.
In view of this, be necessary to provide a kind of novel diffuser plate to address the above problem.
Summary of the invention
To the defective of prior art, the technical problem that the present invention solved is to provide a kind of diffuser plate, and it can effectively improve the diffusivity to light.
For solving the problems of the technologies described above; Technical scheme of the present invention is achieved in that a kind of diffuser plate; This diffuser plate comprises ground floor, the second layer and the 3rd layer, and said ground floor, the second layer and the 3rd layer are fitted each other and be provided with, and the material of adjacent two layers is different; These three layers are integrally formed structure through the one extrusion molding; The material of said ground floor is polymethyl methacrylate or its copolymer, and the material of the second layer is a polystyrene, and the 3rd layer material is polymethyl methacrylate or its copolymer.
Further, said ground floor is provided with the micro-structural that some sizes, shape are all identical and be evenly distributed.
Further, said diffuser plate comprises further and the 4th layer and layer 5 of said three layers of one extrusion molding that the 4th layer material is a polystyrene, and the material of layer 5 is a polymethyl methacrylate.
Further, the ratio of the thickness of said ground floor and the thickness of the second layer is between 0.01 to 1, and the ratio of said threeply degree and second layer thickness is between 0.01 to 1.
Further, the thickness of ground floor equates with the 3rd layer thickness.
Technical scheme of the present invention can also be achieved in that a kind of module backlight; Comprise a diffuser plate and light source; Said diffuser plate comprises ground floor, the second layer and the 3rd layer, and said ground floor, the second layer and the 3rd layer are fitted each other and be provided with, and the material of adjacent two layers is different; These three layers are integrally formed structure through the one extrusion molding; The material of said ground floor is polymethyl methacrylate or its copolymer, and the material of the second layer is a polystyrene, and the 3rd layer material is polymethyl methacrylate or its copolymer.
Further, said light source is positioned at a side of the said second layer.
Further, said ground floor, the 3rd layer are equipped with smooth inner surface and outer surface.
Compared with prior art, the invention has the beneficial effects as follows: improved the diffusivity when light passes diffuser plate, and need not to add the light diffusion ion, reduced the manufacturing cost of diffuser plate and module backlight.
Description of drawings
Fig. 1 is the structural representation of module backlight of the present invention.
Fig. 2 is the structural representation of the diffuser plate of module backlight of the present invention.
Fig. 3 is the structural representation of module group diffusing board backlight in the another embodiment of the present invention.
The specific embodiment
The present invention provides a kind of modified form diffuser plate 20 that is applied on the liquid crystal panel backlight module.As shown in Figure 1; Said module backlight 100; It comprises LGP 10, be located at the diffuser plate 20 of said LGP 10 tops, diffusion barrier 30 and produce the light source 40 of light; The light rays of said light source 40 is passed through LGP 10, diffuser plate 20 and diffusion barrier 30, and is directed to (not shown) on the said liquid crystal panel, makes liquid crystal panel luminous.
See also shown in Figure 2ly, said LGP 10 places the below of said diffuser plate 20, and its major function is to guide radiation direction, with the brightness that improves liquid crystal panel and the uniformity of control light.
Said light source 40 will produce light and finally make liquid crystal panel shinny after its energising for being arranged at the fluorescent tube of said LGP 10 belows.Said module backlight 100 can be divided into the side light-source type or directly descend two kinds of light-source types according to the difference that fluorescent tube is provided with the position.
In other a kind of embodiment, said diffuser plate 20 ' can also be made up of three-decker, please join shown in Figure 3ly, and this diffuser plate 20 ' comprises ground floor 17 ', the second layer 18 ' and the 3rd layer 19 '.Said ground floor 17 ' is polymethyl methacrylate material (PMMA, i.e. an acrylic), and its thickness H1 is between 0.01 millimeter to 1 millimeter, and this ground floor 17 ' is provided with micro-structural 11, and this micro-structural is some sizes, shape is identical and equally distributed prismatic mirror; The said second layer 18 ' is polystyrene material (polystyrene is called for short PS), and its thickness is H2; Said the 3rd layer 19 ' is polymethyl methacrylate material (PMMA, i.e. acrylic), and its thickness H3 equals H1, promptly also between 0.01 millimeter to 1 millimeter.Said three layer 17 ', 18 ', 19 ' is structure as a whole; It is through the one extrusion molding; Because the refractive index of unlike material is different; Refraction angle relation when causing light to pass this said three-layer-material for
wherein; The ratio H1 of said ground floor thickness H1 and second layer thickness H2: H2 (comprises 0.01 and 1) between 0.01 to 1; Equally, the ratio H3 of threeply degree H3 and second layer thickness H2: H2 (comprises 0.01 and 1) between 0.01 to 1.
The employed PMMA material of diffuser plate in each embodiment according to the invention (being acrylic) not only is confined to the acrylic material, the copolymer of also replaceable one-tenth acrylic.
Although be the example purpose; Preferred implementation of the present invention is disclosed; But those of ordinary skill in the art will recognize, under the situation that does not break away from disclosed scope of the present invention and spirit by appending claims, various improvement, increase and replacement are possible.
Claims (8)
1. diffuser plate; It is characterized in that: this diffuser plate comprises ground floor, the second layer and the 3rd layer, and said ground floor, the second layer and the 3rd layer are fitted each other and be provided with, and the material of adjacent two layers is different; These three layers are integrally formed structure through the one extrusion molding; The material of said ground floor is polymethyl methacrylate or its copolymer, and the material of the second layer is a polystyrene, and the 3rd layer material is polymethyl methacrylate or its copolymer.
2. diffuser plate as claimed in claim 1 is characterized in that: said ground floor is provided with the micro-structural that some sizes, shape are all identical and be evenly distributed.
3. diffuser plate as claimed in claim 2; It is characterized in that: said diffuser plate further comprises the 4th layer and layer 5 with said three layers of one extrusion molding; The 4th layer material is a polystyrene, and the material of layer 5 is polymethyl methacrylate or its copolymer.
4. diffuser plate as claimed in claim 1 is characterized in that: the ratio of the thickness of said ground floor and the thickness of the second layer is between 0.01 to 1, and the ratio of said threeply degree and second layer thickness is between 0.01 to 1.
5. diffuser plate as claimed in claim 4 is characterized in that: the thickness of ground floor equates with the 3rd layer thickness.
6. a module backlight comprises a diffuser plate and light source, it is characterized in that: said diffuser plate comprises ground floor, the second layer and the 3rd layer; Said ground floor, the second layer and the 3rd layer of setting of fitting each other; And the material of adjacent two layers is different, and these three layers are integrally formed structure through the one extrusion molding, and the material of said ground floor is polymethyl methacrylate or its copolymer; The material of the second layer is a polystyrene, and the 3rd layer material is polymethyl methacrylate or its copolymer.
7. module backlight as claimed in claim 6 is characterized in that: said light source is positioned at a side of the said second layer.
8. module backlight as claimed in claim 7 is characterized in that: said ground floor, the 3rd layer are equipped with smooth inner surface and outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105086405A CN102444862A (en) | 2010-10-15 | 2010-10-15 | Diffusion plate and backlight module using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105086405A CN102444862A (en) | 2010-10-15 | 2010-10-15 | Diffusion plate and backlight module using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102444862A true CN102444862A (en) | 2012-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105086405A Pending CN102444862A (en) | 2010-10-15 | 2010-10-15 | Diffusion plate and backlight module using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102444862A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094225A (en) * | 2016-08-23 | 2016-11-09 | 京东方科技集团股份有限公司 | A kind of beam splitting coating structure, backlight module and 3D display device |
| TWI607246B (en) * | 2016-03-11 | 2017-12-01 | 台達電子工業股份有限公司 | Diffusing device, laser-light-source module using the same, and method for manufacturing the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624496A (en) * | 2003-12-05 | 2005-06-08 | 杨国栋 | Manufacturing method of optical diffusion plate and optical diffusion plate made by said method |
| CN101008684A (en) * | 2006-01-24 | 2007-08-01 | 科桥电子股份有限公司 | Light-increasing diffusion structure and its manufacturing process |
| CN201803313U (en) * | 2010-10-15 | 2011-04-20 | 苏州拓显光电材料有限公司 | Diffusion plate and backlight module group adopting the same |
-
2010
- 2010-10-15 CN CN2010105086405A patent/CN102444862A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624496A (en) * | 2003-12-05 | 2005-06-08 | 杨国栋 | Manufacturing method of optical diffusion plate and optical diffusion plate made by said method |
| CN101008684A (en) * | 2006-01-24 | 2007-08-01 | 科桥电子股份有限公司 | Light-increasing diffusion structure and its manufacturing process |
| CN201803313U (en) * | 2010-10-15 | 2011-04-20 | 苏州拓显光电材料有限公司 | Diffusion plate and backlight module group adopting the same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI607246B (en) * | 2016-03-11 | 2017-12-01 | 台達電子工業股份有限公司 | Diffusing device, laser-light-source module using the same, and method for manufacturing the same |
| US10367330B2 (en) | 2016-03-11 | 2019-07-30 | Delta Electronics, Inc. | Diffuser, laser-light-source module using the same, and method for manufacturing the same |
| CN106094225A (en) * | 2016-08-23 | 2016-11-09 | 京东方科技集团股份有限公司 | A kind of beam splitting coating structure, backlight module and 3D display device |
| CN106094225B (en) * | 2016-08-23 | 2018-09-11 | 京东方科技集团股份有限公司 | A kind of beam splitting membrane structure, backlight module and 3D display device |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120509 |